Wang Zhen

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A numerical method for nonlinear fractional-order differential equations with constant or time-varying delay is devised. The order here is an arbitrary positive real number, and the differential operator is with the Caputo definition. The general Adams-Bashforth-Moulton method combined with the linear interpolation method is employed to approximate the(More)
(range 3–12 days). No complications occurred during any of the treatment regimens. Although a relapse occurred 15 days after completion of treatment in the oldest patient, who had received cefotaxime and oral tosufl oxacin, re-treatment cured the infection without fecal carriage. The high attack rate may refl ect the high sensitivity of adolescents to(More)
This paper investigates a mean-variance portfolio selection problem in continuous time with fixed and proportional transaction costs. Utilizing the dynamic programming, the Hamilton-Jacobi-Bellman (HJB) equation is derived, and the explicit closed form solution is obtained. Furthermore, the optimal strategies and efficient frontiers are also proposed for(More)
The aim of this study is to compare the outcomes of surgical and conservative treatments of pediatric asymptomatic lumbosacral lipomas, and to address whether the patients can benefit from prophylactic surgeries. The literature reports of surgical and conservative treatments of child asymptomatic lumbosacral lipomas were reviewed and collected, and a(More)
  • Cheng Huibo, Wang Naiang, He Li, Li Xiaohong, Gao Xiang, Wang Zhen +2 others
  • 2015
Inhalable particulate matter seriously affects ambient air quality. To analyze temporal-spatial distribution characteristics of PM10 pollution and the impacts of meteorological factors in China since 2000, using statistical methods and GIS, monitoring data of PM10 during 2000-2013 in China were analyzed. It was found that annual mean of PM10 in northern(More)
A new method of micro-motion parameters estimation based on cyclic autocorrelation function .. Dynamically reconfigurable reaio-over-fiber network with medium access control protocol to provide network access to train Abstract One basic assumption for high-efficient SAR imaging algorithms is azimuth-shift-invariance of SAR data. The new spaceborne(More)
A new method of micro-motion parameters estimation based on cyclic autocorrelation function .. Dynamically reconfigurable reaio-over-fiber network with medium access control protocol to provide network access to train Abstract This paper is concerned with the problem of channel estimation for amplify-and-forward (AF) cooperative relay networks with(More)
  • Peter Bridgewater, Mathieu Régnier, Wang Zhen, Alice Barbe, Kathryn Campbell, David Cooper +2 others
  • 2012
the Bat " Bats provide a range of biodiversity benefits to humans … New drug synthesized from vampire bat saliva in development … Could help stroke victims … Yosemite National Park … hantavirus warning … 22,000 visitors may have been exposed to deadly mouse-borne disease … confirmed cases growing " Healthy people are better able to learn, be productive and(More)